Publication at Faculty of Mathematics and Physics |
2016
Abstract
The lowest gamma-vibrational states with K-pi = 2(gamma)(+) in well-deformed Dy, Er and Yb isotopes are investigated within the self-consistent separable quasiparticle random-phase-approximation (QRPA) approach based on the Skyrme functional. The energies E-gamma and reduced transition probabilities B(E2)(gamma) of the states are calculated with the Skyrme force SV-mas10.
We demonstrate the strong effect of the pairing blocking on the energies of gamma-vibrational states. It is also shown that collectivity of gamma-vibrational states is strictly determined by keeping the Nilsson selection rules in the corresponding lowest 2qp configurations.